M4A1

The M4A1 has retained most qualities and appearances of the Call of Duty 4 version. The M4 in this game is actually very similar to the Bushmaster Modular M4 Carbine, except that the game version has a shorter barrel, indicating that it is a version built for close combat. The AR-15 carry handle which was present in the first game has been replaced with foldable PRI front and ARMS #40L rear sights and the Knight's Armament Rail Interface System (RIS) has been replaced with an ARMS Selective Integrated Rail (SIR) System. It now sports tan camouflage, as opposed to the previous gunmetal color. It noticeably has a band around the magazine, and at times it can be misidentified as a SCAR-H rifle because of it's sights and the overall color of the weapon. Also, the forward grip has been removed from the underside tactical rail system. The M4 comes in many variants in the singleplayer campaign, such as the M4 Sopmod (RDS, M203 and Silencer), M4 Grenadier w/ Holographic, M4 Carbine, etc. Online it is commonly used with the Red Dot sight